نتایج جستجو برای: copper ii phthalocyanine blue

تعداد نتایج: 716131  

2011
Fernanda Condi de Godoi Rodrigo Balloni Rabelo Fernando da Cruz Vasconcellos Marisa Masumi Beppu

Copper nanoparticles were prepared in chitosan (CHI) membranes via reduction of CuSO4.5H2O with sodium borohydride (BH). The fabrication process was performed in two steps: (1) first adsorbing Cu(II) ions in the CHI membranes, followed by (2) a chemical reduction of the Cu(II) ions to zero-valent copper (using BH). This study used SEM, DSC, and XRD to examine the morphological, thermal and chem...

2012
Thomas Ve Karina Mathisen Ronny Helland Odd A. Karlsen Anne Fjellbirkeland Åsmund K. Røhr K. Kristoffer Andersson Rolf-Birger Pedersen Johan R. Lillehaug Harald B. Jensen

Under copper limiting growth conditions the methanotrophic bacterium Methylococcus capsulatus (Bath) secrets essentially only one protein, MopE*, to the medium. MopE* is a copper-binding protein whose structure has been determined by X-ray crystallography. The structure of MopE* revealed a unique high affinity copper binding site consisting of two histidine imidazoles and one kynurenine, the la...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1997
S Karlin Z Y Zhu K D Karlin

The objectives of this and the following paper are to identify commonalities and disparities of the extended environment of mononuclear metal sites centering on Cu, Fe, Mn, and Zn. The extended environment of a metal site within a protein embodies at least three layers: the metal core, the ligand group, and the second shell, which is defined here to consist of all residues distant less than 3.5...

2012
Janja Babič Blaž Likozar Aleksander Pavko

Response surface methodology (central composite design of experiments) was employed to simultaneously optimize enzyme production and productivities of two ligninolytic enzymes produced by Ceriporiopsis subvermispora. Concentrations of glucose, ammonium tartrate and Polysorbate 80 were varied to establish the optimal composition of liquid media (OLM), where the highest experimentally obtained ac...

Journal: :Journal of photochemistry and photobiology. B, Biology 1992
G J Fowler R Devonshire

As part of a wider programme to identify novel photosensitizers for photodynamic therapy, the ability of a number of phthalocyanine dyes, including some novel copper phthalocyanine derivatives with a range of water solubilities, to produce potentially cytotoxic species in solution was examined. The experiments were performed in dimethylformamide using 1,3-diphenylisobenzofuran (DPIBF) as the sc...

Journal: :Inorganic chemistry 2002
Roxanne G Daugherty Tomasz Wasowicz Brian R Gibney Victoria J DeRose

The Cu(II)- and Co(II)-binding properties of two peptides, designed on the basis of the active site sequence and structure of the blue copper protein plastocyanin, are explored. Peptide BCP-A, Ac-Trp-(Gly)(3)-Ser-Tyr-Cys-Ser-Pro-His-Gln-Gly-Ala-Gly-Met-(Gly )(3)-His-(Gly)(2)-Lys-CONH(2), conserves the Cu-binding loop of plastocyanin containing three of the four copper ligands and has a flexible...

Journal: :Bulletin of the Chemical Society of Japan 1977

Journal: :Chemical communications 2006
Eva M García-Frutos Giovanni Bottari Purificación Vázquez Joaquín Barberá Tomás Torres

An ethynyl-substituted nickel(II) phthalocyanine has been synthesised and its thermotropic properties studied; optical microscopy, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques revealed an unusual mesomorphic behaviour observed for the first time in phthalocyanine systems where each disk of the hexagonal columnar mesophase is formed by two ethynyl-substituted ph...

Journal: :Journal of the American Chemical Society 2008
Forest I Bohrer Corneliu N Colesniuc Jeongwon Park Ivan K Schuller Andrew C Kummel William C Trogler

The use of hydrogen peroxide as a precursor to improvised explosives has made its detection a topic of critical importance. Chemiresistor arrays comprised of 50 nm thick films of metallophthalocyanines (MPcs) are redox selective vapor sensors of hydrogen peroxide. Hydrogen peroxide is shown to decrease currents in cobalt phthalocyanine sensors while it increases currents in nickel, copper, and ...

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